JPS58212845A - Twin roll type continuous casting machine - Google Patents

Abstract

PURPOSE:To provide a titled casting machine which does not cause breakout from the transverse end part and can produce a casting material at a high speed, by providing water-cooled side rolls for forming solidified layers between both end parts of the water-cooled main rolls of a twin roll type casting machine in the transverse direction of the casting material. CONSTITUTION:The molten metal stored in a gate 8 is conducted to the spacing between water-cooled main rolls 1 and 1, and is drawn as a thin platelike casting material 9 from the outlet side. A solidified layer 9a is formed on the surface part in the thickness direction of the material 9 by the rolls 1, 1. The solidified layer 9a is formed at the same thickness as the thickness thereof in the thickness direction in the transverse end part of the material 9 by water-cooled side rolls 4, 4 at the same instant. The solidified layers 9a are formed respectively in both of the thickness and transverse directions in the material 9 by the rolls 1, 1 and the rolls 4, 4 in the above-mentioned way. Even if there is an unsolidified layer in the material 9, the breakout of the molten metal to the outside part does not arise. The thin plate is thus cast continuously at a high speed.

Description

[Detailed description of the invention] The present invention relates to a twin roll continuous casting machine.

Conventionally, when casting thin plates using a twin-roll continuous casting machine,
As shown in FIG. 1, the molten metal pooled in the weir 2 on the inlet side of the main water-cooled roll 1.1 is transferred to the main water-cooled roll 1.1.
1 and pull it out from the exit side. At this time, in order to prevent the molten metal pooled in the weir 2 from leaking, the ends of the main water cooling rolls 1, 1 in the plate width direction are connected to the flat plate 3.
It is sealed by sandwiching it at ゜3.

However, the flat plates 3,3 are fixed, and the solidified layer of the cast material that becomes the thin plate moves together with the main rod 1.1, so the flat plates 3.3 and the solidified layer have a relative velocity.
The flat plate 3.3 seemed to correspond to a fixed mold. Therefore, if the roll speed is low, a solidified layer will be formed at the width end of the cast material by the flat plate 3.3, but if the roll speed is high, the solidified layer will not be formed, or even if it is formed, it will be thin and the solidified layer will be formed at the width end of the cast material. There was a problem with breakouts occurring in some parts.

The present invention has been made in view of the above circumstances, and is intended to provide a twin-roll continuous casting machine capable of producing cast material at high speed without causing breakout from the width end.

Hereinafter, the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 2 to 4, side water-cooled rolls 4.4 are disposed facing each other at both ends of the main water-cooled rolls 1, 1 arranged side by side so as to be sandwiched between the main water-cooled rolls 1.1. , a power transmission device 15 so as to rotate each side water-cooled roll 4 in the machine driving direction at the same circumferential speed as the main water-cooled roll 1.
The radial thrust force of the main water-cooled roll 1.1 is transferred to the bearing 6, while the radial thrust force of the side water-cooled roll 4.4 is transferred to the bearing 1.
It is configured so that each person receives their own number.

Further, on the inlet side of the main water-cooled rolls 1, 1, a weir 8 is provided to surround the main water-cooled roll 1.1 and the side water-cooled rolls 4.4 to prevent the molten metal from spilling to the outside. In particular, the shape of this weir 8 is as shown in part A in FIG.
4, and each side water-cooled opening/rule is required to have a length up to the end of each side water-cooled roll 4 so as not to contact the cast material 9. Shape so that the molten metal can come into contact with 4 (see part 8).

In such a configuration, when the bath temperature pooled in the weir 8 is guided between the main water-cooled rolls 1.1 and drawn out from the outlet side as a thin plate-shaped cast material 9, the thicknesswise surface of the cast material 9 has a As shown in FIG. 3, a solidified layer 9a is formed by the main water-cooled rolls 1,1. At the same time, a solidified layer 9a is formed at the width end portion of the cast material 9 by the side water-cooled rolls 4, 4 to have the same thickness as the thickness direction, as shown in FIG.

In this way, each main water-cooled roll 1.1 and side water-cooled roll 4.4 form a solidified layer 9a on the cast material 9 in both the plate thickness direction and the plate width direction, so that the inside of the cast material 9 is Even if there is an unsolidified layer, the molten metal will not break out to the outside.

Therefore, thin plates can be continuously cast at high speed.

It should be noted that the present invention is not limited only to the above-mentioned embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

As described above, according to the present invention, since the side water-cooled rolls are provided facing each other between both ends of the main water-cooled rolls arranged in parallel, a solidified layer is formed in both the thickness direction and the width direction of the cast material. Therefore, breakout of the cast material can be prevented and thin plates can be continuously cast at high speed, which is an excellent effect.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of a conventional twin roll type continuous casting machine, Fig. 2 is a schematic plan view of a twin roll type continuous casting machine of the present invention, Fig. 3 is a view taken from arrow 11 in Fig. 2, The diagram is IV- in Figure 3.
FIG. DESCRIPTION OF SYMBOLS 1... Main water-cooled roll, 4... Side water-cooled roll, 8... Weir, 9... Cast material, 9a... Solidified layer. Patent application person Ishikawajima Harima Heavy Industries Co., Ltd. Patent applicant agent

Claims (1)

[Claims] 1) In a twin-roll continuous casting machine in which the molten metal is guided between the main water-cooled rolls installed in parallel and the cast material is continuously pulled out from the outlet side, a cast material is placed between both ends of the main water-cooled rolls in the sheet width direction of the cast material. A twin-roll type % type characterized by having a side water-cooled roll for forming a coagulated layer.